Internal package function
covload.sub.table(model, skip, nrow, use.model.path = TRUE, theta.only = TRUE)
Named list including theta, omega, sigma, and ofv. For MCMC output file each object are matrixes.
model
number of rows to skip
number of rows to read
Load file from a global defined model library (TRUE=default).
If so will look for a global character vector named model.path
return covariance matrix of theta's only (default)